Unlock instant, AI-driven research and patent intelligence for your innovation.

Injection device with torsion spring and rotatable display

a technology of injection device and rotating display, which is applied in the direction of medical syringes, intravenous devices, automatic syringes, etc., can solve the problems of limited angular resolution, limited angular resolution, and limit the accuracy of the dose setting procedur

Active Publication Date: 2009-02-26
NOVO NORDISK AS
View PDF31 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023]The drive member may be adapted to be connected to the dose setting member via a ratchet. This ratchet allows the dose setting member to be rotated in both directions so that a given dose may be either increased or reduced. Due to the force provided by the torsion spring onto the ratchet, the dose setting member will remain in any position—i.e. dose value—to which it has been brought.

Problems solved by technology

The fact that the dose indicator barrel is only allowed to rotate less than one revolution during dose setting puts a limit to the obtainable angular resolution.
This limited angular resolution also limits the accuracy of the dose setting procedure.
Thus, the accuracy when setting a dose is limited by this rather rough incremental.
However, it is a disadvantage that linear springs are highly non-linear in terms of force vs. compression.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Injection device with torsion spring and rotatable display
  • Injection device with torsion spring and rotatable display
  • Injection device with torsion spring and rotatable display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036]In its most general aspect the present invention relates to an injection device comprising a torsion spring in combination with a rotatable dose indicator mechanism capable of being rotated at least one revolution—i.e. over an angle larger than 360 degrees. For example, the dose indicator mechanism may be implemented as a barrel (see FIGS. 1-4) or as interconnected wheels (see FIG. 5), the latter being operated as a counting device. In order to increase the angular resolution compared to known dose indicator mechanisms the dose indicator mechanism of the present invention is rotatable over an angle of rotation corresponding to at least one revolution. The fact that the dose to be ejected is displayed over at least one revolution allows that the dose setting scale may contain at least 50, 60, 70, 80, 90, 100 units with an incremental of one.

[0037]FIGS. 1-3 show a cross-sectional view of the injection device according to a first embodiment of the present invention. The dose of m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to an injection device comprising a torsion spring operatively connected to a dose setting member being adapted to set a dose to be ejected from the injection device. A rotatably mounted display member adapted to display the dose to be ejected in accordance with a setting of the dose setting member is also provided. The rotatably mounted display member is adapted to be rotated over an angle corresponding to at least one revolution of the display member. The display member may be implemented as a dose indicator barrel having numerals arranged along a helical path on an outer surface thereof, or alternatively, as a counting device having two or more display wheels having numerals arranged on an outer surface thereof.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an injection device, such as a wind-up pen, wherein numerals indicating the dose to be ejected from the injection device are displayed over an angle of rotation exceeding one revolution. In particular, the numerals indicating the dose to be ejected are arranged along a helical path, or alternatively, numerals indicating the dose to be ejected are displayed on a counting device. The present invention ensures that an increased accuracy in dose setting may be obtained.BACKGROUND OF THE INVENTION[0002]Various types of automatic injection devices have been described in the literature. A majority of these automatic injection devices apply dose indicator barrels, dose indicator wheels or the like which, during dose setting, are only allowed to rotate less than one single revolution. The fact that the dose indicator barrel is only allowed to rotate less than one revolution during dose setting puts a limit to the obtainable angular...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A61M5/20
CPCA61M5/14566A61M5/20A61M5/3155A61M5/31553A61M5/31535A61M5/31593A61M2005/3125A61M2005/202A61M5/31583A61M5/31556A61M5/315A61M5/178A61M5/145
Inventor MOLLER, CLAUS SCHMIDTMARKUSSEN, TOM HEDEENGGAARD, CHRISTIAN PETER
Owner NOVO NORDISK AS
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com